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" J. F. MUNZ.

Harrow.

No. 224,601. I Patented Feb. 17,1880.

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Z! V I d! mjtizesses:

PETERS, F'HOTO-LITMOGRAPHER, WASHINGTON D C UNITED STATES PATENT OFFICE-JAKOB F. MUNZ, on DELAWARE, OHIO.

SPECIFICATION forming part. of Letters Patent No. 224,601, datedFebruary 17, 1880.

Application filed December 31, 1879.

To all whom it may concern:

Be it known that I, JAKOB FRIEDRICH MUNZ, of Delaware, in the county ofDelaware and State of Ohio, have. invented certain new and usefulImprovements in Harrows; and I doherebydeclare the following to be afull, clear, and exact description of the invention, such as will enableothersskilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to lettersof reference marked thereon, which form apart of this specification.

This invention has for its object to furnish a harrow made in sectionsand securedtogether with capability of separate vertical movements, andhas a further object to provide a substantial tooth-fastening.

I will first describe my invention, and then specifically point it outin the claims.

In the drawings, Figure 1 is a plan of my harrow, and Fig. 4. is across-section on line w m, Fig. 1; and Figs. .2, 3, and 5 are detailThis modeof attachment permits a free and views of the barrow-toothfastening.

A is the barrow, made in sections a a. a .13 is the draft-bar, which. ismade in sections 1) b b each having a length corresponding to the widthof the sections a a. a as shown, and they are hinged together, so thatthey will fold up. when thesaid sections are folded. To the draft-bar B,I affix suitable devices to which the whiffietrees may be attached.

On the forward end of the sections a a c211 affix ringsor olevises (0?,which connectloosely with rings or staples b on the draft-bar B.

unlimited vertical movement of therear end that when brought together,as shown in Figs.

lfand 4, the longitudinal bars a of the section of the harrowwill beparallel. These bumpers are form ed with vertical slots c which receivethe ends of the hooks of fastenings hereinafter described.

cl is a rotating bar fixed to the center section, c, and providedwithhooks d d on its ends, and soarranged that said hooks may be readilyturned into the slots 0 of the bumpers c, and thus couple all thesections together.

The bar (I may be made in two parts, each capable of being turnedindependently of the other, so that one of the outer sections of theharrow may be coupled to the central section, while the other outersection is left free to swing laterally on its rings a The rod 61 isoperated by a suitable lever, d The rear ends of the sections a a. aeach have a distinct but limited vertical movement when secured by therod cl, which permits the barrow to adapt itself 'to a slight unevennessin the surface of the ground.

0 is the tooth-fastener, which is composed of the two plates 6 e and thestaple-bolt e. The plates 0 are alike in form, and the tooth is togetherand held to the side of the bars a by the staple-bolt e, as shown inFigs. 2 and 5. The plates 6 have their edges cutaway from the endsinward, so that they converge to a central point, 6 giving to them thedouble dovetail form shown. The staple-bolt 6 passes over the plates atthe narrow central point, e The plates are thus held from slidingvertically when fixed to the bars a or from dropping out when the bolt 6is loosened for the purpose of adjusting the toothf.

The plates 0 have formed on their inner faces the series of converginggrooves 6 formed from the opposite ends to the central point or line, 0

Thechannels of both plates are similar in form, and are so arranged thatthey coincide when said plates are brought together face to face andform channels in which the tooth f is placed. By having the groovesconverging to the center 6 it will be seen that the toothfmay be set ina vertical position or to incline forward or back, asmay be desired.

On the back of each plate 0 there is formed a vertical rib, 6 whichextends its wholelen gth. The rib on one of the plates is letinto theside of the rail u while the rib of the other plate fits into the archof the staple-bolt, as shown in Fig. 2.

The bar B, affixed on the front ends of the sections a a M, will fold upwith said sections when desired. The bar B may also be turned up overthe ends of the bars a and the hitchin g devices fixed to the sidethereof. In this position the rear ends of the sections a a a may beturned laterally, and thus adapt the barrow for use in planting smallseeds Where a light disturbance of the surface is desired. The endsection of the bar B will bend forward to permit the spreading of therear ends of the sections of the barrow.

Having thus described my invention, What I claim, and desire to secureby Letters Patent, is-- 1. The combination, with the sections ac (0provided With the slotted bumpers c, of the rotating rod d, fixed to thecentral section, a, and having hooks d, arranged to operate as and forthe purposes set forth.

2. I-n a harrow, the tooth-fastener O, composed of the plates 0 e,havingtheir edges beveled inward to form a narrow central Waist, 6 and havinga series of converging grooves or channels, 6 formedin their innerfacesand uniting on a common center or the central line, 0 and thestaple-bolt e, substantially as and for the purposes set forth.

In testimony that I claim the foregoing I have hereunto set my hand this3d day of December, 1879.

JAKOB FRIEDRICH MUNZ.

Witnesses:

J. S. GILL, E. 1i. HENDERSON.

